INFO: task udevd:5844 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:21928 pid:5844  tgid:5844  ppid:1      task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 do_read_cache_folio+0x1aa/0x590
 read_part_sector+0xb6/0x2b0
 adfspart_check_POWERTEC+0x8c/0xf30
 bdev_disk_changed+0x75f/0x14b0
 blkdev_get_whole+0x380/0x510
 bdev_open+0x31e/0xd30
 blkdev_open+0x457/0x600
 do_dentry_open+0x953/0x13f0
 vfs_open+0x3b/0x340
 path_openat+0x2ee5/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c975169a4
RSP: 002b:00007fff6c36ff10 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055e70424f780 RCX: 00007f2c975169a4
RDX: 00000000000a0800 RSI: 000055e704230310 RDI: 00000000ffffff9c
RBP: 000055e704230310 R08: 0000000000000001 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055e70424d370 R14: 0000000000000001 R15: 000055e70422f910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5672:
 #0: ffff88802327f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by udevd/5844:
 #0: ffff888022a6c358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
2 locks held by kworker/u9:0/16764:
 #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000f037bc0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16764 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:switch_ldt+0x87/0x250
Code: 00 f3 f3 f3 4b 89 04 3c e8 36 af 59 00 49 81 c6 00 08 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 39 24 bd 00 <4d> 8b 2e 4c 8d b3 00 08 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00
RSP: 0018:ffffc9000f037460 EFLAGS: 00000046
RAX: 1ffff1100348f100 RBX: ffffffff8e242100 RCX: ffff88804a3c0000
RDX: 0000000000000000 RSI: ffffffff8e242100 RDI: ffff88801a478000
RBP: ffffc9000f0374f0 R08: ffffffff8e2429b3 R09: 1ffffffff1c48536
R10: dffffc0000000000 R11: fffffbfff1c48537 R12: 1ffff92001e06e8c
R13: ffffffff8e242100 R14: ffff88801a478800 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcd68a4b58 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 switch_mm_irqs_off+0x5b6/0x7a0
 unuse_temporary_mm+0x136/0x220
 __text_poke+0x6c8/0xa10
 smp_text_poke_batch_finish+0xd0f/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_disable_cpuslocked+0xc5/0x1b0
 static_key_disable+0x1a/0x20
 toggle_allocation_gate+0x1a1/0x240
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
